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<html>
<head>
<meta charset='UTF-8'><meta name='viewport' content='width=device-width initial-scale=1'>
<style>
	  body,html{
	            scroll-behavior: smooth;
	        }
</style>
<link rel="icon" href="../img/tx.jpg" type="image/x-icon">
<link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css">  
<script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script>
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<script>
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<link rel="stylesheet" type="text/css" href="../css/demo.css"/>
<script src="../js/js1.js"></script>
<script src="../js/js2.js"></script>
<title>知否</title><style type='text/css'>html {overflow-x: initial !important;}:root { --bg-color:#ffffff; --text-color:#333333; --select-text-bg-color:#B5D6FC; --select-text-font-color:auto; --monospace:"Lucida Console",Consolas,"Courier",monospace; }
html { font-size: 14px; background-color: var(--bg-color); color: var(--text-color); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; -webkit-font-smoothing: antialiased; }
body { margin: 0px; padding: 0px; height: auto; bottom: 0px; top: 0px; left: 0px; right: 0px; font-size: 1rem; line-height: 1.42857; overflow-x: hidden; background: inherit; tab-size: 4; }
iframe { margin: auto; }
a.url { word-break: break-all; }
a:active, a:hover { outline: 0px; }
.in-text-selection, ::selection { text-shadow: none; background: var(--select-text-bg-color); color: var(--select-text-font-color); }
#write { margin: 0px auto; height: auto; width: inherit; word-break: normal; overflow-wrap: break-word; position: relative; white-space: normal; overflow-x: visible; padding-top: 40px; }
#write.first-line-indent p { text-indent: 2em; }
#write.first-line-indent li p, #write.first-line-indent p * { text-indent: 0px; }
#write.first-line-indent li { margin-left: 2em; }
.for-image #write { padding-left: 8px; padding-right: 8px; }
body.typora-export { padding-left: 30px; padding-right: 30px; }
.typora-export .footnote-line, .typora-export li, .typora-export p { white-space: pre-wrap; }
@media screen and (max-width: 500px) {
  body.typora-export { padding-left: 0px; padding-right: 0px; }
  #write { padding-left: 20px; padding-right: 20px; }
  .CodeMirror-sizer { margin-left: 0px !important; }
  .CodeMirror-gutters { display: none !important; }
}
#write li > figure:last-child { margin-bottom: 0.5rem; }
#write ol, #write ul { position: relative; }
img { max-width: 100%; vertical-align: middle; image-orientation: from-image; }
button, input, select, textarea { color: inherit; font: inherit; }
input[type="checkbox"], input[type="radio"] { line-height: normal; padding: 0px; }
*, ::after, ::before { box-sizing: border-box; }
#write h1, #write h2, #write h3, #write h4, #write h5, #write h6, #write p, #write pre { width: inherit; }
#write h1, #write h2, #write h3, #write h4, #write h5, #write h6, #write p { position: relative; }
p { line-height: inherit; }
h1, h2, h3, h4, h5, h6 { break-after: avoid-page; break-inside: avoid; orphans: 4; }
p { orphans: 4; }
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h2 { font-size: 1.8rem; }
h3 { font-size: 1.6rem; }
h4 { font-size: 1.4rem; }
h5 { font-size: 1.2rem; }
h6 { font-size: 1rem; }
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.hidden { display: none; }
.md-blockmeta { color: rgb(204, 204, 204); font-weight: 700; font-style: italic; }
a { cursor: pointer; }
sup.md-footnote { padding: 2px 4px; background-color: rgba(238, 238, 238, 0.7); color: rgb(85, 85, 85); border-radius: 4px; cursor: pointer; }
sup.md-footnote a, sup.md-footnote a:hover { color: inherit; text-transform: inherit; text-decoration: inherit; }
#write input[type="checkbox"] { cursor: pointer; width: inherit; height: inherit; }
figure { overflow-x: auto; margin: 1.2em 0px; max-width: calc(100% + 16px); padding: 0px; }
figure > table { margin: 0px; }
tr { break-inside: avoid; break-after: auto; }
thead { display: table-header-group; }
table { border-collapse: collapse; border-spacing: 0px; width: 100%; overflow: auto; break-inside: auto; text-align: left; }
table.md-table td { min-width: 32px; }
.CodeMirror-gutters { border-right: 0px; background-color: inherit; }
.CodeMirror-linenumber { user-select: none; }
.CodeMirror { text-align: left; }
.CodeMirror-placeholder { opacity: 0.3; }
.CodeMirror pre { padding: 0px 4px; }
.CodeMirror-lines { padding: 0px; }
div.hr:focus { cursor: none; }
#write pre { white-space: pre-wrap; }
#write.fences-no-line-wrapping pre { white-space: pre; }
#write pre.ty-contain-cm { white-space: normal; }
.CodeMirror-gutters { margin-right: 4px; }
.md-fences { font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; overflow: visible; white-space: pre; background: inherit; position: relative !important; }
.md-diagram-panel { width: 100%; margin-top: 10px; text-align: center; padding-top: 0px; padding-bottom: 8px; overflow-x: auto; }
#write .md-fences.mock-cm { white-space: pre-wrap; }
.md-fences.md-fences-with-lineno { padding-left: 0px; }
#write.fences-no-line-wrapping .md-fences.mock-cm { white-space: pre; overflow-x: auto; }
.md-fences.mock-cm.md-fences-with-lineno { padding-left: 8px; }
.CodeMirror-line, twitterwidget { break-inside: avoid; }
.footnotes { opacity: 0.8; font-size: 0.9rem; margin-top: 1em; margin-bottom: 1em; }
.footnotes + .footnotes { margin-top: 0px; }
.md-reset { margin: 0px; padding: 0px; border: 0px; outline: 0px; vertical-align: top; background: 0px 0px; text-decoration: none; text-shadow: none; float: none; position: static; width: auto; height: auto; white-space: nowrap; cursor: inherit; -webkit-tap-highlight-color: transparent; line-height: normal; font-weight: 400; text-align: left; box-sizing: content-box; direction: ltr; }
li div { padding-top: 0px; }
blockquote { margin: 1rem 0px; }
li .mathjax-block, li p { margin: 0.5rem 0px; }
li { margin: 0px; position: relative; }
blockquote > :last-child { margin-bottom: 0px; }
blockquote > :first-child, li > :first-child { margin-top: 0px; }
.footnotes-area { color: rgb(136, 136, 136); margin-top: 0.714rem; padding-bottom: 0.143rem; white-space: normal; }
#write .footnote-line { white-space: pre-wrap; }
@media print {
  body, html { border: 1px solid transparent; height: 99%; break-after: avoid; break-before: avoid; font-variant-ligatures: no-common-ligatures; }
  #write { margin-top: 0px; padding-top: 0px; border-color: transparent !important; }
  .typora-export * { -webkit-print-color-adjust: exact; }
  html.blink-to-pdf { font-size: 13px; }
  .typora-export #write { padding-left: 32px; padding-right: 32px; padding-bottom: 0px; break-after: avoid; }
  .typora-export #write::after { height: 0px; }
  .is-mac table { break-inside: avoid; }
}
.footnote-line { margin-top: 0.714em; font-size: 0.7em; }
a img, img a { cursor: pointer; }
pre.md-meta-block { font-size: 0.8rem; min-height: 0.8rem; white-space: pre-wrap; background: rgb(204, 204, 204); display: block; overflow-x: hidden; }
p > .md-image:only-child:not(.md-img-error) img, p > img:only-child { display: block; margin: auto; }
#write.first-line-indent p > .md-image:only-child:not(.md-img-error) img { left: -2em; position: relative; }
p > .md-image:only-child { display: inline-block; width: 100%; }
#write .MathJax_Display { margin: 0.8em 0px 0px; }
.md-math-block { width: 100%; }
.md-math-block:not(:empty)::after { display: none; }
[contenteditable="true"]:active, [contenteditable="true"]:focus, [contenteditable="false"]:active, [contenteditable="false"]:focus { outline: 0px; box-shadow: none; }
.md-task-list-item { position: relative; list-style-type: none; }
.task-list-item.md-task-list-item { padding-left: 0px; }
.md-task-list-item > input { position: absolute; top: 0px; left: 0px; margin-left: -1.2em; margin-top: calc(1em - 10px); border: none; }
.math { font-size: 1rem; }
.md-toc { min-height: 3.58rem; position: relative; font-size: 0.9rem; border-radius: 10px; }
.md-toc-content { position: relative; margin-left: 0px; }
.md-toc-content::after, .md-toc::after { display: none; }
.md-toc-item { display: block; color: rgb(65, 131, 196); }
.md-toc-item a { text-decoration: none; }
.md-toc-inner:hover { text-decoration: underline; }
.md-toc-inner { display: inline-block; cursor: pointer; }
.md-toc-h1 .md-toc-inner { margin-left: 0px; font-weight: 700; }
.md-toc-h2 .md-toc-inner { margin-left: 2em; }
.md-toc-h3 .md-toc-inner { margin-left: 4em; }
.md-toc-h4 .md-toc-inner { margin-left: 6em; }
.md-toc-h5 .md-toc-inner { margin-left: 8em; }
.md-toc-h6 .md-toc-inner { margin-left: 10em; }
@media screen and (max-width: 48em) {
  .md-toc-h3 .md-toc-inner { margin-left: 3.5em; }
  .md-toc-h4 .md-toc-inner { margin-left: 5em; }
  .md-toc-h5 .md-toc-inner { margin-left: 6.5em; }
  .md-toc-h6 .md-toc-inner { margin-left: 8em; }
}
a.md-toc-inner { font-size: inherit; font-style: inherit; font-weight: inherit; line-height: inherit; }
.footnote-line a:not(.reversefootnote) { color: inherit; }
.md-attr { display: none; }
.md-fn-count::after { content: "."; }
code, pre, samp, tt { font-family: var(--monospace); }
kbd { margin: 0px 0.1em; padding: 0.1em 0.6em; font-size: 0.8em; color: rgb(36, 39, 41); background: rgb(255, 255, 255); border: 1px solid rgb(173, 179, 185); border-radius: 3px; box-shadow: rgba(12, 13, 14, 0.2) 0px 1px 0px, rgb(255, 255, 255) 0px 0px 0px 2px inset; white-space: nowrap; vertical-align: middle; }
.md-comment { color: rgb(162, 127, 3); opacity: 0.8; font-family: var(--monospace); }
code { text-align: left; vertical-align: initial; }
a.md-print-anchor { white-space: pre !important; border-width: initial !important; border-style: none !important; border-color: initial !important; display: inline-block !important; position: absolute !important; width: 1px !important; right: 0px !important; outline: 0px !important; background: 0px 0px !important; text-decoration: initial !important; text-shadow: initial !important; }
.md-inline-math .MathJax_SVG .noError { display: none !important; }
.html-for-mac .inline-math-svg .MathJax_SVG { vertical-align: 0.2px; }
.md-math-block .MathJax_SVG_Display { text-align: center; margin: 0px; position: relative; text-indent: 0px; max-width: none; max-height: none; min-height: 0px; min-width: 100%; width: auto; overflow-y: hidden; display: block !important; }
.MathJax_SVG_Display, .md-inline-math .MathJax_SVG_Display { width: auto; margin: inherit; display: inline-block !important; }
.MathJax_SVG .MJX-monospace { font-family: var(--monospace); }
.MathJax_SVG .MJX-sans-serif { font-family: sans-serif; }
.MathJax_SVG { display: inline; font-style: normal; font-weight: 400; line-height: normal; zoom: 90%; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; }
.MathJax_SVG * { transition: none 0s ease 0s; }
.MathJax_SVG_Display svg { vertical-align: middle !important; margin-bottom: 0px !important; margin-top: 0px !important; }
.os-windows.monocolor-emoji .md-emoji { font-family: "Segoe UI Symbol", sans-serif; }
.md-diagram-panel > svg { max-width: 100%; }
[lang="flow"] svg, [lang="mermaid"] svg { max-width: 100%; height: auto; }
[lang="mermaid"] .node text { font-size: 1rem; }
table tr th { border-bottom: 0px; }
video { max-width: 100%; display: block; margin: 0px auto; }
iframe { max-width: 100%; width: 100%; border: none; }
.highlight td, .highlight tr { border: 0px; }
svg[id^="mermaidChart"] { line-height: 1em; }
mark { background: rgb(255, 255, 0); color: rgb(0, 0, 0); }
.md-html-inline .md-plain, .md-html-inline strong, mark .md-inline-math, mark strong { color: inherit; }
mark .md-meta { color: rgb(0, 0, 0); opacity: 0.3 !important; }


.CodeMirror { height: auto; }
.CodeMirror.cm-s-inner { background: inherit; }
.CodeMirror-scroll { overflow: auto hidden; z-index: 3; }
.CodeMirror-gutter-filler, .CodeMirror-scrollbar-filler { background-color: rgb(255, 255, 255); }
.CodeMirror-gutters { border-right: 1px solid rgb(221, 221, 221); background: inherit; white-space: nowrap; }
.CodeMirror-linenumber { padding: 0px 3px 0px 5px; text-align: right; color: rgb(153, 153, 153); }
.cm-s-inner .cm-keyword { color: rgb(119, 0, 136); }
.cm-s-inner .cm-atom, .cm-s-inner.cm-atom { color: rgb(34, 17, 153); }
.cm-s-inner .cm-number { color: rgb(17, 102, 68); }
.cm-s-inner .cm-def { color: rgb(0, 0, 255); }
.cm-s-inner .cm-variable { color: rgb(0, 0, 0); }
.cm-s-inner .cm-variable-2 { color: rgb(0, 85, 170); }
.cm-s-inner .cm-variable-3 { color: rgb(0, 136, 85); }
.cm-s-inner .cm-string { color: rgb(170, 17, 17); }
.cm-s-inner .cm-property { color: rgb(0, 0, 0); }
.cm-s-inner .cm-operator { color: rgb(152, 26, 26); }
.cm-s-inner .cm-comment, .cm-s-inner.cm-comment { color: rgb(170, 85, 0); }
.cm-s-inner .cm-string-2 { color: rgb(255, 85, 0); }
.cm-s-inner .cm-meta { color: rgb(85, 85, 85); }
.cm-s-inner .cm-qualifier { color: rgb(85, 85, 85); }
.cm-s-inner .cm-builtin { color: rgb(51, 0, 170); }
.cm-s-inner .cm-bracket { color: rgb(153, 153, 119); }
.cm-s-inner .cm-tag { color: rgb(17, 119, 0); }
.cm-s-inner .cm-attribute { color: rgb(0, 0, 204); }
.cm-s-inner .cm-header, .cm-s-inner.cm-header { color: rgb(0, 0, 255); }
.cm-s-inner .cm-quote, .cm-s-inner.cm-quote { color: rgb(0, 153, 0); }
.cm-s-inner .cm-hr, .cm-s-inner.cm-hr { color: rgb(153, 153, 153); }
.cm-s-inner .cm-link, .cm-s-inner.cm-link { color: rgb(0, 0, 204); }
.cm-negative { color: rgb(221, 68, 68); }
.cm-positive { color: rgb(34, 153, 34); }
.cm-header, .cm-strong { font-weight: 700; }
.cm-del { text-decoration: line-through; }
.cm-em { font-style: italic; }
.cm-link { text-decoration: underline; }
.cm-error { color: red; }
.cm-invalidchar { color: red; }
.cm-constant { color: rgb(38, 139, 210); }
.cm-defined { color: rgb(181, 137, 0); }
div.CodeMirror span.CodeMirror-matchingbracket { color: rgb(0, 255, 0); }
div.CodeMirror span.CodeMirror-nonmatchingbracket { color: rgb(255, 34, 34); }
.cm-s-inner .CodeMirror-activeline-background { background: inherit; }
.CodeMirror { position: relative; overflow: hidden; }
.CodeMirror-scroll { height: 100%; outline: 0px; position: relative; box-sizing: content-box; background: inherit; }
.CodeMirror-sizer { position: relative; }
.CodeMirror-gutter-filler, .CodeMirror-hscrollbar, .CodeMirror-scrollbar-filler, .CodeMirror-vscrollbar { position: absolute; z-index: 6; display: none; }
.CodeMirror-vscrollbar { right: 0px; top: 0px; overflow: hidden; }
.CodeMirror-hscrollbar { bottom: 0px; left: 0px; overflow: hidden; }
.CodeMirror-scrollbar-filler { right: 0px; bottom: 0px; }
.CodeMirror-gutter-filler { left: 0px; bottom: 0px; }
.CodeMirror-gutters { position: absolute; left: 0px; top: 0px; padding-bottom: 30px; z-index: 3; }
.CodeMirror-gutter { white-space: normal; height: 100%; box-sizing: content-box; padding-bottom: 30px; margin-bottom: -32px; display: inline-block; }
.CodeMirror-gutter-wrapper { position: absolute; z-index: 4; background: 0px 0px !important; border: none !important; }
.CodeMirror-gutter-background { position: absolute; top: 0px; bottom: 0px; z-index: 4; }
.CodeMirror-gutter-elt { position: absolute; cursor: default; z-index: 4; }
.CodeMirror-lines { cursor: text; }
.CodeMirror pre { border-radius: 0px; border-width: 0px; background: 0px 0px; font-family: inherit; font-size: inherit; margin: 0px; white-space: pre; overflow-wrap: normal; color: inherit; z-index: 2; position: relative; overflow: visible; }
.CodeMirror-wrap pre { overflow-wrap: break-word; white-space: pre-wrap; word-break: normal; }
.CodeMirror-code pre { border-right: 30px solid transparent; width: fit-content; }
.CodeMirror-wrap .CodeMirror-code pre { border-right: none; width: auto; }
.CodeMirror-linebackground { position: absolute; left: 0px; right: 0px; top: 0px; bottom: 0px; z-index: 0; }
.CodeMirror-linewidget { position: relative; z-index: 2; overflow: auto; }
.CodeMirror-wrap .CodeMirror-scroll { overflow-x: hidden; }
.CodeMirror-measure { position: absolute; width: 100%; height: 0px; overflow: hidden; visibility: hidden; }
.CodeMirror-measure pre { position: static; }
.CodeMirror div.CodeMirror-cursor { position: absolute; visibility: hidden; border-right: none; width: 0px; }
.CodeMirror div.CodeMirror-cursor { visibility: hidden; }
.CodeMirror-focused div.CodeMirror-cursor { visibility: inherit; }
.cm-searching { background: rgba(255, 255, 0, 0.4); }
@media print {
  .CodeMirror div.CodeMirror-cursor { visibility: hidden; }
}


/* Flowchart variables */
/* Sequence Diagram variables */
/* Gantt chart variables */
/* state colors */
.label {
  
  color: #333; }

.label text {
  fill: #333; }

.node rect,
.node circle,
.node ellipse,
.node polygon {
  fill: #BDD5EA;
  stroke: #9370DB;
  stroke-width: 1px; }

.node .label {
  text-align: center; }

.node.clickable {
  cursor: pointer; }

.arrowheadPath {
  fill: lightgrey; }

.edgePath .path {
  stroke: lightgrey;
  stroke-width: 1.5px; }

.edgeLabel {
  background-color: #e8e8e8;
  text-align: center; }

.cluster rect {
  fill: #6D6D65;
  stroke: rgba(255, 255, 255, 0.25);
  stroke-width: 1px; }

.cluster text {
  fill: #F9FFFE; }

div.mermaidTooltip {
  position: absolute;
  text-align: center;
  max-width: 200px;
  padding: 2px;
  
  font-size: 12px;
  background: #6D6D65;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 2px;
  pointer-events: none;
  z-index: 100; }

.actor {
  stroke: #81B1DB;
  fill: #BDD5EA; }

text.actor {
  fill: black;
  stroke: none; }

.actor-line {
  stroke: lightgrey; }

.messageLine0 {
  stroke-width: 1.5;
  stroke-dasharray: '2 2';
  stroke: lightgrey; }

.messageLine1 {
  stroke-width: 1.5;
  stroke-dasharray: '2 2';
  stroke: lightgrey; }

#arrowhead {
  fill: lightgrey; }

.sequenceNumber {
  fill: white; }

#sequencenumber {
  fill: lightgrey; }

#crosshead path {
  fill: lightgrey !important;
  stroke: lightgrey !important; }

.messageText {
  fill: lightgrey;
  stroke: none; }

.labelBox {
  stroke: #81B1DB;
  fill: #BDD5EA; }

.labelText {
  fill: #323D47;
  stroke: none; }

.loopText {
  fill: lightgrey;
  stroke: none; }

.loopLine {
  stroke-width: 2;
  stroke-dasharray: '2 2';
  stroke: #81B1DB; }

.note {
  stroke: rgba(255, 255, 255, 0.25);
  fill: #fff5ad; }

.noteText {
  fill: black;
  stroke: none;
  
  font-size: 14px; }

.activation0 {
  fill: #f4f4f4;
  stroke: #666; }

.activation1 {
  fill: #f4f4f4;
  stroke: #666; }

.activation2 {
  fill: #f4f4f4;
  stroke: #666; }

/** Section styling */
.section {
  stroke: none;
  opacity: 0.2; }

.section0 {
  fill: rgba(255, 255, 255, 0.3); }

.section2 {
  fill: #EAE8B9; }

.section1,
.section3 {
  fill: white;
  opacity: 0.2; }

.sectionTitle0 {
  fill: #F9FFFE; }

.sectionTitle1 {
  fill: #F9FFFE; }

.sectionTitle2 {
  fill: #F9FFFE; }

.sectionTitle3 {
  fill: #F9FFFE; }

.sectionTitle {
  text-anchor: start;
  font-size: 11px;
  text-height: 14px;
   }

/* Grid and axis */
.grid .tick {
  stroke: lightgrey;
  opacity: 0.3;
  shape-rendering: crispEdges; }

.grid path {
  stroke-width: 0; }

/* Today line */
.today {
  fill: none;
  stroke: #DB5757;
  stroke-width: 2px; }

/* Task styling */
/* Default task */
.task {
  stroke-width: 2; }

.taskText {
  text-anchor: middle;
   }

.taskText:not([font-size]) {
  font-size: 11px; }

.taskTextOutsideRight {
  fill: #323D47;
  text-anchor: start;
  font-size: 11px;
   }

.taskTextOutsideLeft {
  fill: #323D47;
  text-anchor: end;
  font-size: 11px; }

/* Special case clickable */
.task.clickable {
  cursor: pointer; }

.taskText.clickable {
  cursor: pointer;
  fill: #003163 !important;
  font-weight: bold; }

.taskTextOutsideLeft.clickable {
  cursor: pointer;
  fill: #003163 !important;
  font-weight: bold; }

.taskTextOutsideRight.clickable {
  cursor: pointer;
  fill: #003163 !important;
  font-weight: bold; }

/* Specific task settings for the sections*/
.taskText0,
.taskText1,
.taskText2,
.taskText3 {
  fill: #323D47; }

.task0,
.task1,
.task2,
.task3 {
  fill: #BDD5EA;
  stroke: rgba(255, 255, 255, 0.5); }

.taskTextOutside0,
.taskTextOutside2 {
  fill: lightgrey; }

.taskTextOutside1,
.taskTextOutside3 {
  fill: lightgrey; }

/* Active task */
.active0,
.active1,
.active2,
.active3 {
  fill: #81B1DB;
  stroke: rgba(255, 255, 255, 0.5); }

.activeText0,
.activeText1,
.activeText2,
.activeText3 {
  fill: #323D47 !important; }

/* Completed task */
.done0,
.done1,
.done2,
.done3 {
  stroke: grey;
  fill: lightgrey;
  stroke-width: 2; }

.doneText0,
.doneText1,
.doneText2,
.doneText3 {
  fill: #323D47 !important; }

/* Tasks on the critical line */
.crit0,
.crit1,
.crit2,
.crit3 {
  stroke: #E83737;
  fill: #E83737;
  stroke-width: 2; }

.activeCrit0,
.activeCrit1,
.activeCrit2,
.activeCrit3 {
  stroke: #E83737;
  fill: #81B1DB;
  stroke-width: 2; }

.doneCrit0,
.doneCrit1,
.doneCrit2,
.doneCrit3 {
  stroke: #E83737;
  fill: lightgrey;
  stroke-width: 2;
  cursor: pointer;
  shape-rendering: crispEdges; }

.milestone {
  transform: rotate(45deg) scale(0.8, 0.8); }

.milestoneText {
  font-style: italic; }

.doneCritText0,
.doneCritText1,
.doneCritText2,
.doneCritText3 {
  fill: #323D47 !important; }

.activeCritText0,
.activeCritText1,
.activeCritText2,
.activeCritText3 {
  fill: #323D47 !important; }

.titleText {
  text-anchor: middle;
  font-size: 18px;
  fill: #323D47;
   }

g.classGroup text {
  fill: #9370DB;
  stroke: none;
  
  font-size: 10px; }
  g.classGroup text .title {
    font-weight: bolder; }

g.classGroup rect {
  fill: #BDD5EA;
  stroke: #9370DB; }

g.classGroup line {
  stroke: #9370DB;
  stroke-width: 1; }

.classLabel .box {
  stroke: none;
  stroke-width: 0;
  fill: #BDD5EA;
  opacity: 0.5; }

.classLabel .label {
  fill: #9370DB;
  font-size: 10px; }

.relation {
  stroke: #9370DB;
  stroke-width: 1;
  fill: none; }

#compositionStart {
  fill: #9370DB;
  stroke: #9370DB;
  stroke-width: 1; }

#compositionEnd {
  fill: #9370DB;
  stroke: #9370DB;
  stroke-width: 1; }

#aggregationStart {
  fill: #BDD5EA;
  stroke: #9370DB;
  stroke-width: 1; }

#aggregationEnd {
  fill: #BDD5EA;
  stroke: #9370DB;
  stroke-width: 1; }

#dependencyStart {
  fill: #9370DB;
  stroke: #9370DB;
  stroke-width: 1; }

#dependencyEnd {
  fill: #9370DB;
  stroke: #9370DB;
  stroke-width: 1; }

#extensionStart {
  fill: #9370DB;
  stroke: #9370DB;
  stroke-width: 1; }

#extensionEnd {
  fill: #9370DB;
  stroke: #9370DB;
  stroke-width: 1; }

.commit-id,
.commit-msg,
.branch-label {
  fill: lightgrey;
  color: lightgrey;
   }

.pieTitleText {
  text-anchor: middle;
  font-size: 25px;
  fill: #eee;
}

g.stateGroup text {
  stroke: none;
  font-size: 10px;
}

g.stateGroup circle {
  fill: white !important;
  stroke: white !important;
}

g.stateGroup .state-title {
  font-weight: bolder;
  fill: black; }

g.stateGroup rect {
  fill: #ececff;
  stroke: #9370DB; }

g.stateGroup line {
  stroke: #9370DB;
  stroke-width: 1; }

.transition {
  stroke: #9370DB;
  stroke-width: 1;
  fill: none; }

.stateGroup .composit {
  fill: #555;
  border-bottom: 1px; }

.state-note {
  stroke: rgba(255, 255, 255, 0.25);
  fill: #fff5ad; }
  .state-note text {
    fill: black;
    stroke: none;
    font-size: 10px; }

.stateLabel .box {
  stroke: none;
  stroke-width: 0;
  fill: #BDD5EA;
  opacity: 0.5; }

.stateLabel text {
  fill: black;
  font-size: 10px;
  font-weight: bold;
}

.cluster-label {
  color:black;
}

.statediagram-cluster rect {
  fill: #BDD5EA;
  stroke: #9370DB; 
  stroke-width: 1px;
}
.statediagram-cluster rect.outer {
  rx: 5px;
  ry: 5px;
}
.statediagram-state .divider {
  stroke: #9370DB; 
}

.statediagram-state .title-state {
  rx: 5px;
  ry: 5px;
}
.statediagram-cluster.statediagram-cluster .inner {
  fill: white;
}
.statediagram-cluster.statediagram-cluster-alt .inner {
  fill: #e0e0e0;
}

.statediagram-cluster .inner {
  rx:0;
  ry:0;
}

.statediagram-state rect.basic {
  rx: 5px;
  ry: 5px;
}
.statediagram-state rect.divider {
  stroke-dasharray: 10,10;
  fill: #efefef;
}

.note-edge {
  stroke-dasharray: 5;
}

.statediagram-note rect {
  stroke: var(--cluster-border);
  fill: #fff5ad;
  stroke-width: 1px;
  rx: 0;
  ry: 0;
}

.node circle.state-start {
  fill: black;
  stroke: black;
}
.node circle.state-end {
  fill: black;
  stroke: white;
  stroke-width: 1.5
}
#statediagram-barbEnd {
  fill: #9370DB; 
}

/* CSS Document */

/** code highlight */

.cm-s-inner .cm-variable,
.cm-s-inner .cm-operator,
.cm-s-inner .cm-property {
    color: #b8bfc6;
}

.cm-s-inner .cm-keyword {
    color: #C88FD0;
}

.cm-s-inner .cm-tag {
    color: #7DF46A;
}

.cm-s-inner .cm-attribute {
    color: #7575E4;
}

.CodeMirror div.CodeMirror-cursor {
    border-left: 1px solid #b8bfc6;
    z-index: 3;
}

.cm-s-inner .cm-string {
    color: #D26B6B;
}

.cm-s-inner .cm-comment,
.cm-s-inner.cm-comment {
    color: #DA924A;
}

.cm-s-inner .cm-header,
.cm-s-inner .cm-def,
.cm-s-inner.cm-header,
.cm-s-inner.cm-def {
    color: #8d8df0;
}

.cm-s-inner .cm-quote,
.cm-s-inner.cm-quote {
    color: #57ac57;
}

.cm-s-inner .cm-hr {
    color: #d8d5d5;
}

.cm-s-inner .cm-link {
    color: #d3d3ef;
}

.cm-s-inner .cm-negative {
    color: #d95050;
}

.cm-s-inner .cm-positive {
    color: #50e650;
}

.cm-s-inner .cm-string-2 {
    color: #f50;
}

.cm-s-inner .cm-meta,
.cm-s-inner .cm-qualifier {
    color: #b7b3b3;
}

.cm-s-inner .cm-builtin {
    color: #f3b3f8;
}

.cm-s-inner .cm-bracket {
    color: #997;
}

.cm-s-inner .cm-atom,
.cm-s-inner.cm-atom {
    color: #84B6CB;
}

.cm-s-inner .cm-number {
    color: #64AB8F;
}

.cm-s-inner .cm-variable {
    color: #b8bfc6;
}

.cm-s-inner .cm-variable-2 {
    color: #9FBAD5;
}

.cm-s-inner .cm-variable-3 {
    color: #1cc685;
}

.CodeMirror-selectedtext,
.CodeMirror-selected {
    background: #4a89dc;
    color: #fff !important;
    text-shadow: none;
}

.CodeMirror-gutters {
    border-right: none;
}

/* CSS Document */

/** markdown source **/
.cm-s-typora-default .cm-header, 
.cm-s-typora-default .cm-property
{
    color: #cebcca;
}

.CodeMirror.cm-s-typora-default div.CodeMirror-cursor{
    border-left: 3px solid #b8bfc6;
}

.cm-s-typora-default .cm-comment {
    color: #9FB1FF;
}

.cm-s-typora-default .cm-string {
    color: #A7A7D9
}

.cm-s-typora-default .cm-atom, .cm-s-typora-default .cm-number {
    color: #848695;
    font-style: italic;
}

.cm-s-typora-default .cm-link {
    color: #95B94B;
}

.cm-s-typora-default .CodeMirror-activeline-background {
    background: rgba(51, 51, 51, 0.72);
}

.cm-s-typora-default .cm-comment, .cm-s-typora-default .cm-code {
	color: #8aa1e1;
}@import "";
@import "";
@import "";

:root {
    --bg-color:  #363B40;
    --side-bar-bg-color: #2E3033;
    --text-color: #b8bfc6;

    --select-text-bg-color:#4a89dc;

    --item-hover-bg-color: #0a0d16;
    --control-text-color: #b7b7b7;
    --control-text-hover-color: #eee;
    --window-border: 1px solid #555;

    --active-file-bg-color: rgb(34, 34, 34);
    --active-file-border-color: #8d8df0;

    --primary-color: #a3d5fe;

    --active-file-text-color: white;
    --item-hover-bg-color: #70717d;
    --item-hover-text-color: white;
    --primary-color: #6dc1e7;

    --rawblock-edit-panel-bd: #333;

    --search-select-bg-color: #428bca;
}

html {
    font-size: 16px;
}

html,
body {
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    background: #363B40;
    background: var(--bg-color);
    fill: currentColor;
    line-height: 1.625rem;
}

#write {
    max-width: 914px;
}


@media only screen and (min-width: 1400px) {
	#write {
		max-width: 1024px;
	}
}

@media only screen and (min-width: 1800px) {
	#write {
		max-width: 1200px;
	}
}

html,
body,
button,
input,
select,
textarea,
div.code-tooltip-content {
    color: #b8bfc6;
    border-color: transparent;
}

div.code-tooltip,
.md-hover-tip .md-arrow:after {
    background: #333;
}

.popover.bottom > .arrow:after {
    border-bottom-color: #333;
}

html,
body,
button,
input,
select,
textarea {
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

hr {
    height: 2px;
    border: 0;
    margin: 24px 0 !important;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: "Lucida Grande", "Corbel", sans-serif;
    font-weight: normal;
    clear: both;
    -ms-word-wrap: break-word;
    word-wrap: break-word;
    margin: 0;
    padding: 0;
    color: #DEDEDE
}

h1 {
    font-size: 2.5rem;
    /* 36px */
    line-height: 2.75rem;
    /* 40px */
    margin-bottom: 1.5rem;
    /* 24px */
    letter-spacing: -1.5px;
}

h2 {
    font-size: 1.63rem;
    /* 24px */
    line-height: 1.875rem;
    /* 30px */
    margin-bottom: 1.5rem;
    /* 24px */
    letter-spacing: -1px;
    font-weight: bold;
}

h3 {
    font-size: 1.17rem;
    /* 18px */
    line-height: 1.5rem;
    /* 24px */
    margin-bottom: 1.5rem;
    /* 24px */
    letter-spacing: -1px;
    font-weight: bold;
}

h4 {
    font-size: 1.12rem;
    /* 16px */
    line-height: 1.375rem;
    /* 22px */
    margin-bottom: 1.5rem;
    /* 24px */
    color: white;
}

h5 {
    font-size: 0.97rem;
    /* 16px */
    line-height: 1.25rem;
    /* 22px */
    margin-bottom: 1.5rem;
    /* 24px */
    font-weight: bold;
}

h6 {
    font-size: 0.93rem;
    /* 16px */
    line-height: 1rem;
    /* 16px */
    margin-bottom: 0.75rem;
    color: white;
}

@media (min-width: 980px) {
    h3.md-focus:before,
    h4.md-focus:before,
    h5.md-focus:before,
    h6.md-focus:before {
        color: #ddd;
        border: 1px solid #ddd;
        border-radius: 3px;
        position: absolute;
        left: -1.642857143rem;
        top: .357142857rem;
        float: left;
        font-size: 9px;
        padding-left: 2px;
        padding-right: 2px;
        vertical-align: bottom;
        font-weight: normal;
        line-height: normal;
    }

    h3.md-focus:before {
        content: 'h3';
    }

    h4.md-focus:before {
        content: 'h4';
    }

    h5.md-focus:before {
        content: 'h5';
        top: 0px;
    }

    h6.md-focus:before {
        content: 'h6';
        top: 0px;
    }
}

a {
    text-decoration: none;
    outline: 0;
}

a:hover {
    outline: 0;
}

a:focus {
    outline: thin dotted;
}

sup.md-footnote {
    background-color: #555;
    color: #ddd;
}

p {
    -ms-word-wrap: break-word;
    word-wrap: break-word;
}

p,
ul,
dd,
ol,
hr,
address,
pre,
table,
iframe,
.wp-caption,
.wp-audio-shortcode,
.wp-video-shortcode {
    margin-top: 0;
    margin-bottom: 1.5rem;
    /* 24px */
}

li > blockquote {
	margin-bottom: 0;
}

audio:not([controls]) {
    display: none;
}

[hidden] {
    display: none;
}

::-moz-selection {
    background: #4a89dc;
    color: #fff;
    text-shadow: none;
}

*.in-text-selection,
::selection {
    background: #4a89dc;
    color: #fff;
    text-shadow: none;
}

ul,
ol {
    padding: 0 0 0 1.875rem;
    /* 30px */
}

ul {
    list-style: square;
}

ol {
    list-style: decimal;
}

ul ul,
ol ol,
ul ol,
ol ul {
    margin: 0;
}

b,
th,
dt,
strong {
    font-weight: bold;
}

i,
em,
dfn,
cite {
    font-style: italic;
}

blockquote {
    padding-left: 1.875rem;
    margin: 0 0 1.875rem 1.875rem;
    border-left: solid 2px #474d54;
    padding-left: 30px;
    margin-top: 35px;
}

pre,
code,
kbd,
tt,
var {
    font-size: 0.875rem;
    font-family: Monaco, Consolas, "Andale Mono", "DejaVu Sans Mono", monospace;
}

code,
tt,
var {
    background: rgba(0, 0, 0, 0.05);
}

kbd {
    padding: 2px 4px;
    font-size: 90%;
    color: #fff;
    background-color: #333;
    border-radius: 3px;
    box-shadow: inset 0 -1px 0 rgba(0,0,0,.25);
}

pre.md-fences {
    padding: 10px 10px 10px 30px;
    margin-bottom: 20px;
    background: #333;
}

.CodeMirror-gutters {
    background: #333;
    border-right: 1px solid transparent;
}

.enable-diagrams pre.md-fences[lang="sequence"] .code-tooltip,
.enable-diagrams pre.md-fences[lang="flow"] .code-tooltip,
.enable-diagrams pre.md-fences[lang="mermaid"] .code-tooltip {
    bottom: -2.2em;
    right: 4px;
}

code,
kbd,
tt,
var {
    padding: 2px 5px;
}

table {
    max-width: 100%;
    width: 100%;
    border-collapse: collapse;
    border-spacing: 0;
}

th,
td {
    padding: 5px 10px;
    vertical-align: top;
}

a {
    -webkit-transition: all .2s ease-in-out;
    transition: all .2s ease-in-out;
}

hr {
    background: #474d54;
    /* variable */
}

h1 {
    margin-top: 2em;
}

a {
    color: #e0e0e0;
    text-decoration: underline;
}

a:hover {
    color: #fff;
}

.md-inline-math script {
    color: #81b1db;
}

b,
th,
dt,
strong {
    color: #DEDEDE;
    /* variable */
}

mark {
    background: #D3D40E;
}

blockquote {
    color: #9DA2A6;
}

table a {
    color: #DEDEDE;
    /* variable */
}

th,
td {
    border: solid 1px #474d54;
    /* variable */
}

.task-list {
    padding-left: 0;
}

.md-task-list-item {
    padding-left: 1.25rem;
}

.md-task-list-item > input {
    top: auto;
}

.md-task-list-item > input:before {
    content: "";
    display: inline-block;
    width: 0.875rem;
    height: 0.875rem;
    vertical-align: middle;
    text-align: center;
    border: 1px solid #b8bfc6;
    background-color: #363B40;
    margin-top: -0.4rem;
}

.md-task-list-item > input:checked:before,
.md-task-list-item > input[checked]:before {
    content: '\221A';
    /*◘*/
    font-size: 0.625rem;
    line-height: 0.625rem;
    color: #DEDEDE;
}

/** quick open **/
.auto-suggest-container {
    border: 0px;
    background-color: #525C65;
}

#typora-quick-open {
    background-color: #525C65;
}

#typora-quick-open input{
    background-color: #525C65;
    border: 0;
    border-bottom: 1px solid grey;
}

.typora-quick-open-item {
    background-color: inherit;
    color: inherit;
}

.typora-quick-open-item.active,
.typora-quick-open-item:hover {
    background-color: #4D8BDB;
    color: white;
}

.typora-quick-open-item:hover {
    background-color: rgba(77, 139, 219, 0.8);
}

.typora-search-spinner > div {
  background-color: #fff;
}

#write pre.md-meta-block {
    border-bottom: 1px dashed #ccc;
    background: transparent;
    padding-bottom: 0.6em;
    line-height: 1.6em;
}

.btn,
.btn .btn-default {
    background: transparent;
    color: #b8bfc6;
}

.ty-table-edit {
    border-top: 1px solid gray;
    background-color: #363B40;
}

.popover-title {
    background: transparent;
}

.md-image>.md-meta {
    color: #BBBBBB;
    background: transparent;
}

.md-expand.md-image>.md-meta {
    color: #DDD;
}

#write>h3:before,
#write>h4:before,
#write>h5:before,
#write>h6:before {
    border: none;
    border-radius: 0px;
    color: #888;
    text-decoration: underline;
    left: -1.4rem;
    top: 0.2rem;
}

#write>h3.md-focus:before {
    top: 2px;
}

#write>h4.md-focus:before {
    top: 2px;
}

.md-toc-item {
    color: #A8C2DC;
}

#write div.md-toc-tooltip {
    background-color: #363B40;
}

.dropdown-menu .btn:hover,
.dropdown-menu .btn:focus,
.md-toc .btn:hover,
.md-toc .btn:focus {
    color: white;
    background: black;
}

#toc-dropmenu {
    background: rgba(50, 54, 59, 0.93);
    border: 1px solid rgba(253, 253, 253, 0.15);
}

#toc-dropmenu .divider {
    background-color: #9b9b9b;
}

.outline-expander:before {
    top: 2px;
}

#typora-sidebar {
    box-shadow: none;
    border-right: 1px dashed;
    border-right: none;
}

.sidebar-tabs {
    border-bottom:0;
}

#typora-sidebar:hover .outline-title-wrapper {
    border-left: 1px dashed;
}

.outline-title-wrapper .btn {
    color: inherit;
}

.outline-item:hover {
    border-color: #363B40;
    background-color: #363B40;
    color: white;
}

h1.md-focus .md-attr,
h2.md-focus .md-attr,
h3.md-focus .md-attr,
h4.md-focus .md-attr,
h5.md-focus .md-attr,
h6.md-focus .md-attr,
.md-header-span .md-attr {
    color: #8C8E92;
    display: inline;
}

.md-comment {
    color: #5a95e3;
    opacity: 1;
}

.md-inline-math svg {
    color: #b8bfc6;
}

#math-inline-preview .md-arrow:after {
    background: black;
}

.modal-content {
    background: var(--bg-color);
    border: 0;
}

.modal-title {
    font-size: 1.5em;
}

.modal-content input {
    background-color: rgba(26, 21, 21, 0.51);
    color: white;
}

.modal-content .input-group-addon {
    color: white;
}

.modal-backdrop {
    background-color: rgba(174, 174, 174, 0.7);
}

.modal-content .btn-primary {
    border-color: var(--primary-color);
}

.md-table-resize-popover {
    background-color: #333;
}

.form-inline .input-group .input-group-addon {
    color: white;
}

#md-searchpanel {
    border-bottom: 1px dashed grey;
}

/** UI for electron */

.context-menu,
#spell-check-panel,
#footer-word-count-info {
    background-color: #42464A;
}

.context-menu.dropdown-menu .divider,
.dropdown-menu .divider {
    background-color: #777777;
}

footer {
    color: inherit;
}

@media (max-width: 1000px) {
    footer {
        border-top: none;
    }
    footer:hover {
        color: inherit;
    }
}

#file-info-file-path .file-info-field-value:hover {
    background-color: #555;
    color: #dedede;
}

.megamenu-content,
.megamenu-opened header {
    background: var(--bg-color);
}

.megamenu-menu-panel h2,
.megamenu-menu-panel h1,
.long-btn {
    color: inherit;
}

.megamenu-menu-panel input[type='text'] {
    background: inherit;
    border: 0;
    border-bottom: 1px solid;
}

#recent-file-panel-action-btn {
    background: inherit;
    border: 1px grey solid;
}

.megamenu-menu-panel .dropdown-menu > li > a {
    color: inherit;
    background-color: #2F353A;
    text-decoration: none;
}

.megamenu-menu-panel table td:nth-child(1) {
    color: inherit;
    font-weight: bold;
}

.megamenu-menu-panel tbody tr:hover td:nth-child(1) {
    color: white;
}

.modal-footer .btn-default, 
.modal-footer .btn-primary,
.modal-footer .btn-default:not(:hover) {
    border: 1px solid;
    border-color: transparent;
}

.btn-default:hover, .btn-default:focus, .btn-default.focus, .btn-default:active, .btn-default.active, .open > .dropdown-toggle.btn-default {
    color: white;
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<div  id='write'  class = ''><h1><a name="html基础结构" class="md-header-anchor"></a><span>HTML基础&amp;结构</span></h1><blockquote><h2><a name="什么是html" class="md-header-anchor"></a><span>什么是HTML</span></h2></blockquote><ol><li><span>HyperText Markup Language 简称为HTML</span></li><li><span>HyperText: 超文本 (文本 + 图片 + 音频 + 视频 + 链接)</span></li><li><span>Markup Language: 标记语言</span></li><li><span>由SGML(标准通用标记语言)发展而来</span></li><li><span>写给浏览器的语言</span></li></ol><hr /><p><span> </span></p><blockquote><h2><a name="html版本以及历史" class="md-header-anchor"></a><span>HTML版本以及历史</span></h2></blockquote><ol><li><span>html 1.0——1993年6月(IETF制定)</span></li><li><span>HTML 2.0——1995年11月</span></li><li><span>HTML 3.0——1996年1月</span></li><li><span>HTML 4.0——1997年</span></li><li><span>HTML 5.0——2008年1月22日(第一份正式草案)</span></li><li><span>W3C: World Wide Web Consortium (W3C 理事会或万维网联盟) </span><a href='http://www.w3.org/'><span>http://www.w3.org</span></a></li></ol><p><span> </span></p><hr /><p><span> </span></p><blockquote><h2><a name="html5" class="md-header-anchor"></a><span>HTML5</span></h2></blockquote><p><span>HTML5的设计目的是为了在移动设备上支持多媒体。 新的语法特征被引进以支持这一点，如video、audio和canvas svg webgl标记。 HTML5还引进了新的功能，可以真正改变用户与文档的交互方式，包括：</span></p><ol><li><span>新的解析规则增强了灵活性</span></li><li><span>新属性</span></li><li><span>淘汰过时的或冗余的属性</span></li><li><span>一个HTML5文档到另一个文档间的拖放功能</span></li><li><span>离线编辑等等</span></li></ol><p><span>支持Html5的浏览器包括Firefox，IE9及其更高版本，Chrome，Safari，Opera等； 搜狗浏览器、QQ浏览器、猎豹浏览器等国产浏览器同样具备支持HTML5的能力</span></p><p><span> </span></p><hr /><p><span> </span></p><blockquote><h2><a name="html5声明标签" class="md-header-anchor"></a><span>HTML5声明标签</span></h2></blockquote><h5><a name="1-定义和用法" class="md-header-anchor"></a><span>1. 定义和用法</span></h5><p><code>&lt;!DOCTYPE&gt;</code><span> 声明是文档中的第一个成分，位于</span></p><p><span>标签之前 该标签告知浏览器文档所使用的 HTML 规范</span></p><p><span> </span></p><h5><a name="2-html5文档声明" class="md-header-anchor"></a><span>2. HTML5文档声明</span></h5><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;!DOCTYPE HTML&gt;</span></pre></div></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 26px;"></div><div class="CodeMirror-gutters" style="display: none; height: 26px;"></div></div></div></pre><p><span>注释：</span><code>&lt;!DOCTYPE&gt;</code><span> 标签没有结束标签！ 提示：</span><code>&lt;!DOCTYPE&gt;</code><span> 对大小写不敏感。 在所有 HTML 文档中规定文档类型很重要，这样浏览器才能了解所预期的文档类型。</span></p><hr /><p><span> </span></p><blockquote><h2><a name="html基本结构" class="md-header-anchor"></a><span>HTML基本结构</span></h2></blockquote><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;!DOCTYPE HTML&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;html&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;head&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp; &nbsp;  &lt;title&gt;我的第一个网页&lt;/title&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;/head&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;body&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp; &nbsp;  Hello world~</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;/body&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/html&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 260px;"></div><div class="CodeMirror-gutters" style="display: none; height: 260px;"></div></div></div></pre><ul><li><span>HTML元素由开始标签和结束标签组成</span></li><li><span>位于开始标签和结束标签中的文本是元素的内容</span></li><li><span>HTML标签有开始必须有结束，如果是没有内容的标签(空标签), 用/&gt;来结束</span></li><li><span>标签名不区分大小写，但是XHTML中标签名必须用小写</span></li><li><span>标签具有属性，属性用来表示标签的性质和特征。属性要在开始标签中指定</span></li></ul><p><span> </span></p><hr /><p>&nbsp;</p><blockquote><h2><a name="html基本元素" class="md-header-anchor"></a><span>HTML基本元素</span></h2></blockquote><h5><a name="1-换行" class="md-header-anchor"></a><span>1. 换行</span></h5><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;br /&gt;</span></pre></div></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 26px;"></div><div class="CodeMirror-gutters" style="display: none; height: 26px;"></div></div></div></pre><p><span> </span></p><h5><a name="2-段落" class="md-header-anchor"></a><span>2. 段落</span></h5><figure><table><thead><tr><th style='text-align:center;' ><span>属性</span></th><th style='text-align:center;' ><span>说明</span></th></tr></thead><tbody><tr><td style='text-align:center;' ><span>align</span></td><td style='text-align:center;' ><span>对齐方式 （left，right， center）</span></td></tr></tbody></table></figure><p><span> </span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;p&gt;这是一个段落&lt;p/&gt;</span></pre></div></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 26px;"></div><div class="CodeMirror-gutters" style="display: none; height: 26px;"></div></div></div></pre><p><span> </span></p><h5><a name="3-标题" class="md-header-anchor"></a><span>3. 标题</span></h5><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;h1&gt;标题1&lt;h1/&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;h2&gt;标题2&lt;h2/&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;h3&gt;标题3&lt;h3/&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;h4&gt;标题4&lt;h4/&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;h5&gt;标题5&lt;h5/&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;h6&gt;标题6&lt;h6/&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 286px;"></div><div class="CodeMirror-gutters" style="display: none; height: 286px;"></div></div></div></pre><p><span> </span></p><h5><a name="4-水平线" class="md-header-anchor"></a><span>4. 水平线</span></h5><figure><table><thead><tr><th style='text-align:center;' ><span>属性</span></th><th style='text-align:center;' ><span>说明</span></th></tr></thead><tbody><tr><td style='text-align:center;' ><span>size</span></td><td style='text-align:center;' ><span>指定线的粗细(px)</span></td></tr><tr><td style='text-align:center;' ><span>width</span></td><td style='text-align:center;' ><span>指定线的长度(px或%)</span></td></tr></tbody></table></figure><p><span> </span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;hr size="5" width="50%" align="center" /&gt;</span></pre></div></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 26px;"></div><div class="CodeMirror-gutters" style="display: none; height: 26px;"></div></div></div></pre><p><span> </span></p><h5><a name="5-文本格式化" class="md-header-anchor"></a><span>5. 文本格式化</span></h5><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;b&gt;定义粗体文本&lt;/b&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;i&gt; 定义斜体文本 &lt;/i&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;s&gt;定义删除文本&lt;/s&gt; &lt;del&gt;&lt;/del&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;u&gt;定义下划线文本&lt;/u&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;sup&gt;定义上标字&lt;/sup&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><div class="" style="position: relative;"><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;sub&gt;定义下标字&lt;/sub&gt;</span></pre></div></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 286px;"></div><div class="CodeMirror-gutters" style="display: none; height: 286px;"></div></div></div></pre><h5><a name="6-预格式文本" class="md-header-anchor"></a><span>6. 预格式文本</span></h5><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;pre&gt;标签可以保留文字在源代码中的格式,使得页面中显示的内容和源代码中的格式一致&lt;/pre&gt;</span></pre></div></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 26px;"></div><div class="CodeMirror-gutters" style="display: none; height: 26px;"></div></div></div></pre><h5><a name="7-字体" class="md-header-anchor"></a><span>7. 字体</span></h5><figure><table><thead><tr><th style='text-align:center;' ><span>属性</span></th><th style='text-align:center;' ><span>说明</span></th></tr></thead><tbody><tr><td style='text-align:center;' ><span>size</span></td><td style='text-align:center;' ><span>定义字体大小</span></td></tr><tr><td style='text-align:center;' ><span>face</span></td><td style='text-align:center;' ><span>定义字体</span></td></tr><tr><td style='text-align:center;' ><span>color</span></td><td style='text-align:center;' ><span>定义字体颜色</span></td></tr></tbody></table></figure><p><span> </span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;font&gt;这是一段文字&lt;/font&gt;</span></pre></div></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 26px;"></div><div class="CodeMirror-gutters" style="display: none; height: 26px;"></div></div></div></pre><ul><li><span>16进制的模式 #DCC123</span></li><li><span>单词模式 red ,blue ,green ,black</span></li><li><span>RGB rgb(20,100,35) 0-255</span></li></ul><h5><a name="8-链接" class="md-header-anchor"></a><span>8. 链接</span></h5><figure><table><thead><tr><th style='text-align:center;' ><span>属性</span></th><th style='text-align:center;' ><span>说明</span></th></tr></thead><tbody><tr><td style='text-align:center;' ><span>href</span></td><td style='text-align:center;' ><span>定义链接地址</span></td></tr><tr><td style='text-align:center;' ><span>title</span></td><td style='text-align:center;' ><span>链接提示信息</span></td></tr><tr><td style='text-align:center;' ><span>target</span></td><td style='text-align:center;' ><span>链接打开方式(</span><em><span>blank 新的空白页,</span></em><span>self 当前页,_top)</span></td></tr></tbody></table></figure><p><span> </span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;a href="URL"&gt; ~ &lt;/a&gt;</span></pre></div></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 26px;"></div><div class="CodeMirror-gutters" style="display: none; height: 26px;"></div></div></div></pre><blockquote><p><span>(1). 区分内部外部链接</span></p></blockquote><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">外部链接：&lt;a href="http://www.163.com"&gt; 网易 &lt;/a&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">内部链接：&lt;a href="about.html"&gt; 公司简介 &lt;/a&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 52px;"></div><div class="CodeMirror-gutters" style="display: none; height: 52px;"></div></div></div></pre><blockquote><p><span>(2). 锚点</span></p></blockquote><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">锚点(锚点标签用于使用户"跳"到文档的某个部分)</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;a name="位置名"&gt; ~ &lt;/a&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;a href="#位置名"&gt; ~ &lt;/a&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 78px;"></div><div class="CodeMirror-gutters" style="display: none; height: 78px;"></div></div></div></pre><blockquote><p><span>(3). 其他应用链接</span></p></blockquote><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;a href="mailto:邮箱地址"&gt;邮件链接&lt;/a&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;a href="tel:电话号码"&gt;一键拨打&lt;/a&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;a href="sms:139xxxxxxx"&gt;一键发送短信&lt;/a&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 78px;"></div><div class="CodeMirror-gutters" style="display: none; height: 78px;"></div></div></div></pre><p><span> </span></p><h5><a name="9-图像" class="md-header-anchor"></a><span>9. 图像</span></h5><figure><table><thead><tr><th style='text-align:center;' ><span>属性</span></th><th style='text-align:center;' ><span>说明</span></th></tr></thead><tbody><tr><td style='text-align:center;' ><span>src</span></td><td style='text-align:center;' ><span>定义图像的url</span></td></tr><tr><td style='text-align:center;' ><span>alt</span></td><td style='text-align:center;' ><span>定义图像的替代文本</span></td></tr><tr><td style='text-align:center;' ><span>width</span></td><td style='text-align:center;' ><span>设置图像的宽度</span></td></tr><tr><td style='text-align:center;' ><span>height</span></td><td style='text-align:center;' ><span>设置图像的高度</span></td></tr></tbody></table></figure><p><span> </span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;img src="URL" width="100" height="100" alt="替代文字" /&gt;</span></pre></div></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 26px;"></div><div class="CodeMirror-gutters" style="display: none; height: 26px;"></div></div></div></pre><p><span> </span></p><h5><a name="10-html图像热区" class="md-header-anchor"></a><span>10. HTML图像热区</span></h5><figure><table><thead><tr><th style='text-align:center;' ><span>属性</span></th><th style='text-align:center;' ><span>说明</span></th></tr></thead><tbody><tr><td style='text-align:center;' ><span>shape</span></td><td style='text-align:center;' ><span>热区形状(rect,circle,poly)</span></td></tr><tr><td style='text-align:center;' ><span>coords</span></td><td style='text-align:center;' ><span>形状的坐标值</span></td></tr></tbody></table></figure><p><span> </span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;img src="URL" usemap="# map 名称" /&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;map name="map 名称"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;area shape="形状" coords="坐标值" href="URL" /&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/map&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 104px;"></div><div class="CodeMirror-gutters" style="display: none; height: 104px;"></div></div></div></pre><p><span> </span></p><h5><a name="11-html的特殊字符" class="md-header-anchor"></a><span>11. HTML的特殊字符</span></h5><ul><li><span>某些字符在 HTML 中具有特殊意义,如大于号 (&lt;) 定义 HTML 标签的开始</span></li><li><span>字符实体用于在 HTML 文档中插入特殊字符,如版权号 ,注册商标等</span></li><li><span>通常情况下,HTML会自动截去多余的空格。不管你加多少空格,都被看做一个空格。</span></li><li><span>比如你在两个字之间加了10个空格,HTML会截去9个空格,只保留一个。</span></li><li><span>为了在网页中增加空格,你可以使用``表示空格。</span></li></ul><p><span> </span></p><blockquote><p><span>HTML的特殊字符</span></p></blockquote><figure><table><thead><tr><th style='text-align:center;' ><span>属性</span></th><th style='text-align:center;' ><span>结构</span></th></tr></thead><tbody><tr><td style='text-align:center;' ><span>空格</span></td><td style='text-align:center;' ><span>``</span></td></tr><tr><td style='text-align:center;' ><span>小于号</span></td><td style='text-align:center;' ><code>&lt;</code></td></tr><tr><td style='text-align:center;' ><span>大于号</span></td><td style='text-align:center;' ><code>&gt;</code></td></tr><tr><td style='text-align:center;' ><span>引号</span></td><td style='text-align:center;' ><code>&quot;</code></td></tr><tr><td style='text-align:center;' ><span>版权号</span></td><td style='text-align:center;' ><code>©</code></td></tr><tr><td style='text-align:center;' ><span>注册商标</span></td><td style='text-align:center;' ><code>®</code></td></tr><tr><td style='text-align:center;' ><span>商标</span></td><td style='text-align:center;' ><code>™</code></td></tr><tr><td style='text-align:center;' ><span>乘号</span></td><td style='text-align:center;' ><code>×</code></td></tr><tr><td style='text-align:center;' ><span>除号</span></td><td style='text-align:center;' ><code>÷</code></td></tr><tr><td style='text-align:center;' ><span>元（yen）</span></td><td style='text-align:center;' ><code>¥</code></td></tr><tr><td style='text-align:center;' ><span>镑（pound）</span></td><td style='text-align:center;' ><code>£</code></td></tr><tr><td style='text-align:center;' ><span>和号</span></td><td style='text-align:center;' ><code>&amp;</code></td></tr></tbody></table></figure><p>&nbsp;</p><h1><a name="html表格列表框架" class="md-header-anchor"></a><span>HTML表格&amp;列表&amp;框架</span></h1><blockquote><h2><a name="html表格" class="md-header-anchor"></a><span>HTML表格</span></h2><p><span>表格由 </span><code>&lt;table&gt;</code><span> 标签以及一个或多个 tr、th或td 元素组成 单元格可以包含文本、图片、列表、段落、表单、水平线、表格等等</span></p></blockquote><p><span> </span></p><figure><table><thead><tr><th style='text-align:center;' ><span>属性</span></th><th style='text-align:center;' ><span>说明</span></th></tr></thead><tbody><tr><td style='text-align:center;' ><span>width</span></td><td style='text-align:center;' ><span>指定表格的宽度</span></td></tr><tr><td style='text-align:center;' ><span>height</span></td><td style='text-align:center;' ><span>表格的高度</span></td></tr><tr><td style='text-align:center;' ><span>border</span></td><td style='text-align:center;' ><span>指定表格边框的宽度</span></td></tr><tr><td style='text-align:center;' ><span>cellpadding</span></td><td style='text-align:center;' ><span>指定边框与内容之间的空白</span></td></tr><tr><td style='text-align:center;' ><span>cellspacing</span></td><td style='text-align:center;' ><span>指定单元格之间的空白</span></td></tr><tr><td style='text-align:center;' ><span>align</span></td><td style='text-align:center;' ><span>指定对齐方式</span></td></tr><tr><td style='text-align:center;' ><span>valign</span></td><td style='text-align:center;' ><span>垂直排列方式</span></td></tr><tr><td style='text-align:center;' ><span>colspan</span></td><td style='text-align:center;' ><span>合并列单元格</span></td></tr><tr><td style='text-align:center;' ><span>rowspan</span></td><td style='text-align:center;' ><span>合并行单元格</span></td></tr></tbody></table></figure><p><span> </span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;table border="1"&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;tr&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;td&gt;row 1, cell 1&lt;/td&gt; &lt;td&gt;row 1, cell 2&lt;/td&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;/tr&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;tr&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;td&gt;row 2, cell 1&lt;/td&gt; &lt;td&gt;row 2, cell 2&lt;/td&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;/tr&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/table&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;table&gt; 定义表格</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;th&gt; 定义表头</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;tr&gt; 定义表格的行</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;td&gt; 定义表格单元</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 338px;"></div><div class="CodeMirror-gutters" style="display: none; height: 338px;"></div></div></div></pre><p><span> </span></p><hr /><p>&nbsp;</p><blockquote><h2><a name="html列表" class="md-header-anchor"></a><span>HTML列表</span></h2><p><span>列表用来在网页上组织信息,HTML能够创建三种类型的列表:无序列表、有序列表、定义列表</span></p></blockquote><ul><li><span>无序列表</span></li></ul><figure><table><thead><tr><th style='text-align:center;' ><span>属性</span></th><th style='text-align:center;' ><span>属性值</span></th><th style='text-align:center;' ><span>说明</span></th></tr></thead><tbody><tr><td style='text-align:center;' ><span>Type</span></td><td style='text-align:center;' ><span>disc、Circle、square</span></td><td style='text-align:center;' ><span>用来设置项目前面的标记</span></td></tr></tbody></table></figure><p><span> </span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;ul&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;li&gt;......&lt;/li&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;li&gt;......&lt;/li&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;li&gt;......&lt;/li&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/ul&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 130px;"></div><div class="CodeMirror-gutters" style="display: none; height: 130px;"></div></div></div></pre><p><span> </span></p><ul><li><span>有序列表</span></li></ul><figure><table><thead><tr><th style='text-align:center;' ><span>属性</span></th><th style='text-align:center;' ><span>属性值</span></th><th style='text-align:center;' ><span>说明</span></th></tr></thead><tbody><tr><td style='text-align:center;' ><span>Type</span></td><td style='text-align:center;' ><span>1、 a 、 A、i、I</span></td><td style='text-align:center;' ><span>用来设置项目前面的标记</span></td></tr><tr><td style='text-align:center;' ><span>start</span></td><td style='text-align:center;' ><span>数值</span></td><td style='text-align:center;' ><span>从哪里开始</span></td></tr></tbody></table></figure><p><span> </span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;ol&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;li&gt;......&lt;/li&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;li&gt;......&lt;/li&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;li&gt;......&lt;/li&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/ol&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 130px;"></div><div class="CodeMirror-gutters" style="display: none; height: 130px;"></div></div></div></pre><p><span> </span></p><ul><li><span>定义列表</span></li></ul><blockquote><p><span>定义列表用来组织术语和它们的定义 任何信息如果包含多个术语和相对应的解释,都可以使用定义列表进行组织</span></p></blockquote><p><span> </span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;dl&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;dt&gt;HTML&lt;/dt&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;dd&gt;html 是超文本标记语言&lt;/dd&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;dt&gt;XHTML&lt;/dt&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;dd&gt;可扩展超文本置标语言 &lt;/dd&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;dd&gt;表现形式与超文本置标语言(HTML)类似,不过语法上更加严格 &lt;/dd&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/dl&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 182px;"></div><div class="CodeMirror-gutters" style="display: none; height: 182px;"></div></div></div></pre><p><span> </span></p><hr /><p><span> </span></p><blockquote><h2><a name="html-背景" class="md-header-anchor"></a><span>HTML 背景</span></h2></blockquote><ol><li><span>设置背景颜色 </span><code>&lt;body bgcolor=&quot;#000000&quot;&gt;</code></li><li><span>设置背景图片 </span><code>&lt;body background=&quot;bg.jpg&quot;&gt;</code></li><li><span>设置网页的字颜色 </span><code>&lt;body text=&quot;#cccccc&quot;&gt;</code></li></ol><p><span> </span></p><hr /><p><span> </span></p><blockquote><h2><a name="html-框架" class="md-header-anchor"></a><span>HTML 框架</span></h2></blockquote><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">框架的作用就是把浏览器窗口划分成多个子窗口。 每个子窗口可以载入自的HTML文档</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">在HTML文档中 frameset 与body同级，只能存在一个</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 52px;"></div><div class="CodeMirror-gutters" style="display: none; height: 52px;"></div></div></div></pre><p><span> </span></p><ul><li><span>框架基本结构</span></li></ul><figure><table><thead><tr><th style='text-align:center;' ><span>属性</span></th><th style='text-align:center;' ><span>说明</span></th></tr></thead><tbody><tr><td style='text-align:center;' ><span>rows</span></td><td style='text-align:center;' ><span>上下分割窗口</span></td></tr><tr><td style='text-align:center;' ><span>cols</span></td><td style='text-align:center;' ><span>左右分割窗口</span></td></tr><tr><td style='text-align:center;' ><span>src</span></td><td style='text-align:center;' ><span>指定要载入到框架的页面地址</span></td></tr><tr><td style='text-align:center;' ><span>name</span></td><td style='text-align:center;' ><span>框架的名称</span></td></tr></tbody></table></figure><p><span> </span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;frameset rows="高度A,高度B"&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;frame src="top.html" /&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;frameset cols="宽度A,宽度B"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp;  &lt;frame src="menu.html" /&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp;  &lt;frame src="main.html" /&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;/frameset&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/frameset&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 182px;"></div><div class="CodeMirror-gutters" style="display: none; height: 182px;"></div></div></div></pre><p><span> </span></p><p><span> </span></p><ul><li><span>frame框架标签</span></li></ul><figure><table><thead><tr><th style='text-align:center;' ><span>属性</span></th><th style='text-align:center;' ><span>属性值</span></th><th style='text-align:center;' ><span>说明</span></th></tr></thead><tbody><tr><td style='text-align:center;' ><span>scrolling</span></td><td style='text-align:center;' ><span>yes、no、auto</span></td><td style='text-align:center;' ><span>是否显示滚动条</span></td></tr><tr><td style='text-align:center;' ><span>noresize</span></td><td style='text-align:center;' ><span>...</span></td><td style='text-align:center;' ><span>禁止改变框架的尺寸大小</span></td></tr><tr><td style='text-align:center;' ><span>marginwidth</span></td><td style='text-align:center;' ><span>px</span></td><td style='text-align:center;' ><span>框架内左右的空白区域</span></td></tr><tr><td style='text-align:center;' ><span>marginheight</span></td><td style='text-align:center;' ><span>px</span></td><td style='text-align:center;' ><span>框架内上下的空白区域</span></td></tr><tr><td style='text-align:center;' ><span>frameborder</span></td><td style='text-align:center;' ><span>1,0</span></td><td style='text-align:center;' ><span>是否显示边框</span></td></tr></tbody></table></figure><p><span> </span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;frame scrolling="yes" noresize /&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;frame marginwidth="左右缩进" marginheight="上下缩进" /&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 52px;"></div><div class="CodeMirror-gutters" style="display: none; height: 52px;"></div></div></div></pre><p><span> </span></p><ul><li><span>内嵌框架iframe</span></li></ul><p><span> </span></p><figure><table><thead><tr><th style='text-align:center;' ><span>属性</span></th><th style='text-align:center;' ><span>属性值</span></th><th style='text-align:center;' ><span>说明</span></th></tr></thead><tbody><tr><td style='text-align:center;' ><span>width</span></td><td style='text-align:center;' ><span>px,%</span></td><td style='text-align:center;' ><span>指定框架的宽度</span></td></tr><tr><td style='text-align:center;' ><span>height</span></td><td style='text-align:center;' ><span>px,%</span></td><td style='text-align:center;' ><span>指定框架的高度</span></td></tr><tr><td style='text-align:center;' ><span>scrolling</span></td><td style='text-align:center;' ><span>yes,no,auto</span></td><td style='text-align:center;' ><span>是否显示滚动条</span></td></tr><tr><td style='text-align:center;' ><span>frameborder</span></td><td style='text-align:center;' ><span>1,0</span></td><td style='text-align:center;' ><span>是否显示边框</span></td></tr></tbody></table></figure><p><span> </span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;iframe src="URL" name="框架名"&gt; ~ &lt;/iframe&gt;</span></pre></div></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 26px;"></div><div class="CodeMirror-gutters" style="display: none; height: 26px;"></div></div></div></pre><h1><a name="html表单" class="md-header-anchor"></a><span>HTML表单</span></h1><p><span> </span></p><blockquote><p><span>表单是一个包含表单元素的区域。 表单能够包含 input 元素,textarea、select、fieldset、legend 和 label元素。 表单使用标签</span><code>(&lt;form&gt;)</code><span>定义。 表单用于向服务器传输数据。</span></p></blockquote><p><span> </span></p><ul><li><span>表单的结构</span></li></ul><figure><table><thead><tr><th style='text-align:center;' ><span>属性</span></th><th style='text-align:center;' ><span>说明</span></th></tr></thead><tbody><tr><td style='text-align:center;' ><span>name</span></td><td style='text-align:center;' ><span>表单的名称</span></td></tr><tr><td style='text-align:center;' ><span>action</span></td><td style='text-align:center;' ><span>表单提交地址</span></td></tr><tr><td style='text-align:center;' ><span>method</span></td><td style='text-align:center;' ><span>表单数据提交的方式 (get ,post)</span></td></tr><tr><td style='text-align:center;' ><span>enctype</span></td><td style='text-align:center;' ><span>MIME类型</span></td></tr><tr><td style='text-align:center;' ><span>novalidate</span></td><td style='text-align:center;' ><span>规定当提交表单时不对表单数据（输入）进行验证</span></td></tr></tbody></table></figure><p><span> </span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;form name="form1" action="URL" method="get"&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  用户名:&lt;input type="text" name="uname" /&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  密 码:&lt;input type="password" name="passwd" /&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/form&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 104px;"></div><div class="CodeMirror-gutters" style="display: none; height: 104px;"></div></div></div></pre><p><span> </span></p><ul><li><span>input类型</span></li></ul><figure><table><thead><tr><th style='text-align:center;' ><span>类型</span></th><th style='text-align:center;' ><span>说明</span></th></tr></thead><tbody><tr><td style='text-align:center;' ><span>button</span></td><td style='text-align:center;' ><span>定义可点击的按钮（大多与 JavaScript 使用来启动脚本）</span></td></tr><tr><td style='text-align:center;' ><span>checkbox</span></td><td style='text-align:center;' ><span>定义复选框。</span></td></tr><tr><td style='text-align:center;' ><span>color</span></td><td style='text-align:center;' ><span>定义拾色器。</span></td></tr><tr><td style='text-align:center;' ><span>date</span></td><td style='text-align:center;' ><span>定义日期字段（带有 calendar 控件）</span></td></tr><tr><td style='text-align:center;' ><span>month</span></td><td style='text-align:center;' ><span>定义日期字段的月（带有 calendar 控件）</span></td></tr><tr><td style='text-align:center;' ><span>week</span></td><td style='text-align:center;' ><span>定义日期字段的周（带有 calendar 控件）</span></td></tr><tr><td style='text-align:center;' ><span>time</span></td><td style='text-align:center;' ><span>定义日期字段的时、分、秒（带有 time 控件）</span></td></tr><tr><td style='text-align:center;' ><span>email</span></td><td style='text-align:center;' ><span>定义用于 e-mail 地址的文本字段</span></td></tr><tr><td style='text-align:center;' ><span>file</span></td><td style='text-align:center;' ><span>定义输入字段和 &quot;浏览...&quot; 按钮，供文件上传</span></td></tr><tr><td style='text-align:center;' ><span>hidden</span></td><td style='text-align:center;' ><span>定义隐藏输入字段</span></td></tr><tr><td style='text-align:center;' ><span>image</span></td><td style='text-align:center;' ><span>定义图像作为提交按钮,必须把 src 属性 和 alt 属性 结合使用。</span></td></tr><tr><td style='text-align:center;' ><span>number</span></td><td style='text-align:center;' ><span>定义带有 spinner 控件的数字字段</span></td></tr><tr><td style='text-align:center;' ><span>password</span></td><td style='text-align:center;' ><span>定义密码字段。字段中的字符会被遮蔽。</span></td></tr><tr><td style='text-align:center;' ><span>radio</span></td><td style='text-align:center;' ><span>定义单选按钮。</span></td></tr><tr><td style='text-align:center;' ><span>range</span></td><td style='text-align:center;' ><span>定义带有 slider 控件的数字字段。</span></td></tr><tr><td style='text-align:center;' ><span>reset</span></td><td style='text-align:center;' ><span>定义重置按钮。重置按钮会将所有表单字段重置为初始值。</span></td></tr><tr><td style='text-align:center;' ><span>search</span></td><td style='text-align:center;' ><span>定义用于搜索的文本字段。</span></td></tr><tr><td style='text-align:center;' ><span>submit</span></td><td style='text-align:center;' ><span>定义提交按钮。提交按钮向服务器发送数据。</span></td></tr><tr><td style='text-align:center;' ><span>tel</span></td><td style='text-align:center;' ><span>定义用于电话号码的文本字段。</span></td></tr><tr><td style='text-align:center;' ><span>text</span></td><td style='text-align:center;' ><span>默认。定义单行输入字段，用户可在其中输入文本。默认是 20 个字符。</span></td></tr><tr><td style='text-align:center;' ><span>url</span></td><td style='text-align:center;' ><span>定义用于 URL 的文本字段。</span></td></tr></tbody></table></figure><p><span> </span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="" style="break-inside: unset;"><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="button" value="普通按钮" /&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="checkbox" value="复选框" /&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="color" value="拾色器" /&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="date" value="" /&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="month" value="" /&gt;选择月份</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="week" value="" /&gt;选择周</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="time" value="" /&gt;选择时间</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="email" value="" /&gt;Email</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="file" value="" /&gt;文件类型</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="hidden" value="" /&gt;隐藏域</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="image" src="" alt="Submit" /&gt;选择图片</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="number" value="" /&gt;数字键盘</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="password" value="" /&gt;输入密码</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="radio" value="" /&gt;单选按钮</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="range" min="0" max="10" step="1" /&gt;选择范围</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="reset" value="重置" /&gt;表单重置按钮</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="search" value="" /&gt;用于搜索</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="submit" value="提交" /&gt; 提交按钮</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="tel" value="" /&gt;电话号码字段</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="text" value="" /&gt;输入框</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><div class="" style="position: relative;"><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="url" value="http://baidu.com" /&gt;输入连接</span></pre></div></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 1066px;"></div><div class="CodeMirror-gutters" style="display: none; height: 1066px;"></div></div></div></pre><ul><li><span>input属性</span></li></ul><figure><table><thead><tr><th style='text-align:center;' ><span>属性</span></th><th style='text-align:center;' ><span>说明</span></th></tr></thead><tbody><tr><td style='text-align:center;' ><span>type</span></td><td style='text-align:center;' ><span>input元素类型</span></td></tr><tr><td style='text-align:center;' ><span>name</span></td><td style='text-align:center;' ><span>input元素的名称</span></td></tr><tr><td style='text-align:center;' ><span>value</span></td><td style='text-align:center;' ><span>input元素的值</span></td></tr><tr><td style='text-align:center;' ><span>size</span></td><td style='text-align:center;' ><span>input元素的宽度</span></td></tr><tr><td style='text-align:center;' ><span>readonly</span></td><td style='text-align:center;' ><span>是否只读</span></td></tr><tr><td style='text-align:center;' ><span>maxlength</span></td><td style='text-align:center;' ><span>输入字符的字符长度</span></td></tr><tr><td style='text-align:center;' ><span>disabled</span></td><td style='text-align:center;' ><span>是否禁用</span></td></tr><tr><td style='text-align:center;' ><span>autofocus</span></td><td style='text-align:center;' ><span>属性规定当页面加载时按钮应当自动地获得焦点</span></td></tr><tr><td style='text-align:center;' ><span>form</span></td><td style='text-align:center;' ><span>位于 form 表单外的输入字段（但仍然属于 form 表单的一部分）</span></td></tr><tr><td style='text-align:center;' ><span>pattern</span></td><td style='text-align:center;' ><span>pattern 属性规定用于验证 </span><code>&lt;input&gt;</code><span> 元素的值的正则表达式</span></td></tr><tr><td style='text-align:center;' ><span>placeholder</span></td><td style='text-align:center;' ><span>属性规定可描述输入字段预期值的简短的提示信息</span></td></tr><tr><td style='text-align:center;' ><span>list</span></td><td style='text-align:center;' ><span>list 属性引用 </span><code>&lt;datalist&gt;</code><span> 元素，其中包含 </span><code>&lt;input&gt;</code><span> 元素的预定义选项</span></td></tr><tr><td style='text-align:center;' ><span>min, max, step</span></td><td style='text-align:center;' ><span>最小值,最大值,如果 step=&quot;3&quot;，则合法数字应该是 -3、0、3、6，以此类推</span></td></tr><tr><td style='text-align:center;' ><span>multiple</span></td><td style='text-align:center;' ><span>可接受多个值的文件上传字段</span></td></tr><tr><td style='text-align:center;' ><span>required</span></td><td style='text-align:center;' ><span>必填</span></td></tr></tbody></table></figure><p><span> </span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="" style="break-inside: unset;"><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="text" readonly /&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="text" maxlength /&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="text" disabled /&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type=text autofocus /&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">---form---</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;form action="demo_form.html" id="form1"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">First name: &lt;input type="text" name="fname"&gt;&lt;br&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="submit" value="Submit"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/form&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">Last name: &lt;input type="text" name="lname" form="form1"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">---pattern---</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;form action="demo_form.html"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">Country code: &lt;input type="text" name="country_code" pattern="[A-Za-z]{3}" title="Three letter country code"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="submit"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/form&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">---list---</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;form action="demo-form.php" method="get"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input list="browsers" name="browser"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;datalist id="browsers"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;option value="Internet Explorer"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;option value="Firefox"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;option value="Chrome"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;option value="Opera"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;option value="Safari"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/datalist&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="submit"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/form&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">---min, max, step---</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="number" name="quantity" step="2" min="1" max="6"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">---multiple---</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">选择图片: &lt;input type="file" name="img" multiple&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">---require---</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="text" name="usrname" required&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 1248px;"></div><div class="CodeMirror-gutters" style="display: none; height: 1248px;"></div></div></div></pre><p><span> </span></p><ul><li><span>textarea(多行文本框)</span></li></ul><p><span> </span></p><figure><table><thead><tr><th style='text-align:center;' ><span>属性</span></th><th style='text-align:center;' ><span>说明</span></th></tr></thead><tbody><tr><td style='text-align:center;' ><span>name</span></td><td style='text-align:center;' ><span>元素的名称</span></td></tr><tr><td style='text-align:center;' ><span>rows</span></td><td style='text-align:center;' ><span>指定文本框的高度</span></td></tr><tr><td style='text-align:center;' ><span>cols</span></td><td style='text-align:center;' ><span>指定文本框的宽度</span></td></tr></tbody></table></figure><p><span> </span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;textarea name="content" rows="5" cols="50"&gt; &lt;/textarea&gt;</span></pre></div></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 26px;"></div><div class="CodeMirror-gutters" style="display: none; height: 26px;"></div></div></div></pre><ul><li><span>select(下拉列表框)</span></li></ul><p><span> </span></p><figure><table><thead><tr><th style='text-align:center;' ><span>属性</span></th><th style='text-align:center;' ><span>说明</span></th></tr></thead><tbody><tr><td style='text-align:center;' ><span>name</span></td><td style='text-align:center;' ><span>下拉列表框的名称</span></td></tr><tr><td style='text-align:center;' ><span>size</span></td><td style='text-align:center;' ><span>下拉列表框的显示行数</span></td></tr><tr><td style='text-align:center;' ><span>multiple</span></td><td style='text-align:center;' ><span>是否多选</span></td></tr><tr><td style='text-align:center;' ><span>disabled</span></td><td style='text-align:center;' ><span>是否禁用</span></td></tr><tr><td style='text-align:center;' ><span>selected</span></td><td style='text-align:center;' ><span>设置默认选中的选项</span></td></tr><tr><td style='text-align:center;' ><span>value</span></td><td style='text-align:center;' ><span>选项的值</span></td></tr></tbody></table></figure><p><span> </span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;select name="city"&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;option value="0"&gt;请选择&lt;/option&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;option value="bj"&gt;北京&lt;/option&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;option value="gz"&gt;广州&lt;/option&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/select&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 130px;"></div><div class="CodeMirror-gutters" style="display: none; height: 130px;"></div></div></div></pre><p><span> </span></p><ul><li><span>optgroup(用于组合选项的标签)</span></li></ul><p><span> </span></p><figure><table><thead><tr><th style='text-align:center;' ><span>属性</span></th><th style='text-align:center;' ><span>说明</span></th></tr></thead><tbody><tr><td style='text-align:center;' ><span>label</span></td><td style='text-align:center;' ><span>指定组合选项名称</span></td></tr></tbody></table></figure><p><span> </span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;select name="city"&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;option value="0"&gt;请选择&lt;/option&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;optgroup label="主要城市"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp;  &lt;option value="bj"&gt;北京&lt;/option&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp;  &lt;option value="gz"&gt;广州&lt;/option&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;/optgroup&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/select&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 182px;"></div><div class="CodeMirror-gutters" style="display: none; height: 182px;"></div></div></div></pre><p><span> </span></p><ul><li><span>fieldset(组合标签)</span></li></ul><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;fieldset&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;legend&gt;基本资料&lt;/legend&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;form&gt;&lt;/form&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/fieldset&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 104px;"></div><div class="CodeMirror-gutters" style="display: none; height: 104px;"></div></div></div></pre><p><span> </span></p><ul><li><span>lable</span></li></ul><blockquote><p><span>lable标签的作用是将输入项或选项及其标签文字关联起来</span></p></blockquote><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="radio" name="sex" value="1" id="male" /&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;label for="male"&gt;男&lt;/label&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;input type="radio" name="sex" value="0" id="female" /&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;label for="female"&gt;女&lt;/label&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 104px;"></div><div class="CodeMirror-gutters" style="display: none; height: 104px;"></div></div></div></pre><h1><a name="html5新增标签" class="md-header-anchor"></a><span>HTML5新增标签</span></h1><blockquote><h2><a name="head设置页面头信息" class="md-header-anchor"></a><span>head设置页面头信息</span></h2></blockquote><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="" style="break-inside: unset;"><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">设置页面标题</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;title&gt; ~ &lt;/title&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">设置页面编码:</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;meta http-equiv="Content-Type" content="text/html; charset=utf-8" /&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  utf-8 多国语言编码</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  gb2312 中文简体编码</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">设置页面关键字,内容介绍</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;meta name="keywords" content="关键字1,关键字2,..." /&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;meta name="description" content="关键字1,关键字2,..." /&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;meta name="author" content="mycodewind，mycodewind@qq.com"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;meta name="copyright" content="本网站版权归XXXXX所有"&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 364px;"></div><div class="CodeMirror-gutters" style="display: none; height: 364px;"></div></div></div></pre><p><span> </span></p><blockquote><h2><a name="audio音频标签" class="md-header-anchor"></a><span>audio音频标签</span></h2></blockquote><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="" style="break-inside: unset;"><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">1.标签定义及使用说明</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &lt;audio&gt; 标签定义声音，比如音乐或其他音频流。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">目前，&lt;audio&gt; 元素支持的3种文件格式：MP3、Wav、Ogg。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">2. 浏览器支持</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; IE 9+、Firefox、Opera、Chrome 和 Safari 都支持 &lt;audio&gt; 标签。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; 注释： IE 8 或更早版本的 IE 浏览器不支持 &lt;audio&gt; 标签。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">3.属性</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  Autoplay:如果出现该属性，则音频在就绪后马上播放  autoplay=”autoplay”</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  Controls:如果出现该属性，则向用户显示音频控件 controls=”controls”</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  Loop:如果出现该属性，则每当音频结束时重新开始播放 loop=”loop”</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">4. 实例</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;audio controls&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;source src="horse.ogg" type="audio/ogg"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;source src="horse.mp3" type="audio/mpeg"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;source src="horse.wav" type="audio/wav"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  您的浏览器不支持 audio 元素。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/audio&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 572px;"></div><div class="CodeMirror-gutters" style="display: none; height: 572px;"></div></div></div></pre><p><span> </span></p><p><span> </span></p><blockquote><h2><a name="video标签将视频作为页面背景" class="md-header-anchor"></a><span>video标签将视频作为页面背景</span></h2></blockquote><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="" style="break-inside: unset;"><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;!DOCTYPE html&gt;</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;html lang="en"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;head&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;meta charset="UTF-8"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;meta name="viewport" content="width=device-width, initial-scale=1.0"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;meta http-equiv="X-UA-Compatible" content="ie=edge"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;title&gt;Document&lt;/title&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;style&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp; &nbsp;  body{</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  margin:0;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp; &nbsp;  }</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp; &nbsp;  video{</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  position: fixed;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  right:0;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  bottom:0;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  min-width:100%;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  min-height:100%;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  width:auto;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  height:auto;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  z-index:-1000;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  /* -webkit-filter: grayscale(100%); */</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp; &nbsp;  }</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;/style&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/head&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;body&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;video autoplay id="background" muted&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp; &nbsp;  &lt;source src="./80s.mp4" /&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;/video&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/body&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/html&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;script&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  //获取id为background的元素</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  var background = document.getElementById("background");</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  //将视频速度调慢</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  background.playbackRate = 0.5;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/script&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 988px;"></div><div class="CodeMirror-gutters" style="display: none; height: 988px;"></div></div></div></pre><p><span> </span></p><p><span> </span></p><blockquote><h2><a name="div布局容器标签" class="md-header-anchor"></a><span>div布局容器标签</span></h2></blockquote><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="" style="break-inside: unset;"><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">div 与其它标签一样,也是一个XHTML所支持的标签 &nbsp; &nbsp; </span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  div 是XHTML中指定的,专门用于布局设计的容器标签 &nbsp; &nbsp; &nbsp; </span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  在css布局方式中,div是这种布局方式的核心对象,我们的页面排版不再依赖于表格 &nbsp; &nbsp; &nbsp; </span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  仅从div的使用上说,做一个简单的布局只需要两样东西:div与css &nbsp; &nbsp; &nbsp; </span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  因此我们称这种布局方式为 div + css 布局 &nbsp; &nbsp; &nbsp; </span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;div id="header"&gt;页面头部&lt;/div&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;div id="content"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp;  &lt;div id="left"&gt;&lt;/div&gt; </span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp;  &lt;div id="right"&gt;&lt;/div&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;/div&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;div id="footer"&gt;页脚&lt;/div&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 364px;"></div><div class="CodeMirror-gutters" style="display: none; height: 364px;"></div></div></div></pre><p><span> </span></p><blockquote><h2><a name="span区块标签" class="md-header-anchor"></a><span>span区块标签</span></h2></blockquote><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">1.标签定义及使用说明</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;span&gt; 用于对文档中的行内元素进行组合。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;span&gt; 标签没有固定的格式表现。当对它应用样式时，它才会产生视觉上的变化。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">如果不对 &lt;span&gt; 应用样式，那么 &lt;span&gt; 元素中的文本与其他文本不会任何视觉上的差异。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;span&gt; 标签提供了一种将文本的一部分或者文档的一部分独立出来的方式。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">实例：</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;p&gt;我的母亲有 &lt;span style="color:blue"&gt;蓝色&lt;/span&gt; 的眼睛。&lt;/p&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 208px;"></div><div class="CodeMirror-gutters" style="display: none; height: 208px;"></div></div></div></pre><p><span> </span></p><p><span> </span></p><blockquote><h2><a name="header头部标签" class="md-header-anchor"></a><span>header头部标签</span></h2></blockquote><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="" style="break-inside: unset;"><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">1.标签定义及使用说明</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;header&gt; 标签定义文档或者文档的一部分区域的页眉。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;header&gt; 元素应该作为介绍内容或者导航链接栏的容器。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">在一个文档中，您可以定义多个 &lt;header&gt; 元素。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">注释：&lt;header&gt; 标签不能被放在 &lt;footer&gt;、&lt;address&gt; 或者另一个 &lt;header&gt; 元素内部。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">1. 浏览器支持</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> IE 9、Firefox、Opera、Chrome 和 Safari 支持 &lt;header&gt; 标签。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  注释：IE 8 或更早版本的 IE 浏览器不支持 &lt;header&gt; 标签。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">3. 实例</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;article&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;header&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;h1&gt;Internet Explorer 9&lt;/h1&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;p&gt;&lt;time pubdate datetime="2011-03-15"&gt;&lt;/time&gt;&lt;/p&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;/header&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;p&gt;Windows Internet Explorer 9 (abbreviated as IE9) was released to</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  the  public on March 14, 2011 at 21:00 PDT.....&lt;/p&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/article&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 520px;"></div><div class="CodeMirror-gutters" style="display: none; height: 520px;"></div></div></div></pre><p>&nbsp;</p><blockquote><h2><a name="footer底部标签" class="md-header-anchor"></a><span>footer底部标签</span></h2></blockquote><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="" style="break-inside: unset;"><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">1.标签定义及使用说明</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;footer&gt; 标签定义文档或者文档的一部分区域的页脚。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;footer&gt; 元素应该包含它所包含的元素的信息。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">在典型情况下，该元素会包含文档创作者的姓名、文档的版权信息、使用条款的链接、联系信息等等。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">在一个文档中，您可以定义多个 &lt;footer&gt; 元素。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">2. 浏览器支持</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">IE 9、Firefox、Opera、Chrome 和 Safari 支持 &lt;footer&gt; 标签。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">注释：IE 8 或更早版本的 IE 浏览器不支持 &lt;footer&gt; 标签。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">3. 实例</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;footer&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;p&gt;Posted by: Hege Refsnes&lt;/p&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;p&gt;&lt;time pubdate datetime="2012-03-01"&gt;&lt;/time&gt;&lt;/p&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/footer&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 416px;"></div><div class="CodeMirror-gutters" style="display: none; height: 416px;"></div></div></div></pre><p><span> </span></p><p><span> </span></p><blockquote><h2><a name="nav导航元素" class="md-header-anchor"></a><span>nav导航元素</span></h2></blockquote><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="" style="break-inside: unset;"><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">1.标签定义及使用说明</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">表示页面中导航链接的部分，例如：传统导航条，侧边栏导航，页内导航，翻页等</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;nav&gt; 标签定义导航链接的部分。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">并不是所有的 HTML 文档都要使用到 &lt;nav&gt; 元素。&lt;nav&gt; 元素只是作为标注一个导航链接的区域。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">在不同设备上（手机或者PC）可以制定导航链接是否显示，以适应不同屏幕的需求。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">1. 浏览器支持</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">目前大多数浏览器支持 &lt;nav&gt; 标签。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">3. 实例</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;nav&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;a href="/html/"&gt;HTML&lt;/a&gt; |</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;a href="/css/"&gt;CSS&lt;/a&gt; |</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;a href="/js/"&gt;JavaScript&lt;/a&gt; |</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;a href="/jquery/"&gt;jQuery&lt;/a&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/nav&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 442px;"></div><div class="CodeMirror-gutters" style="display: none; height: 442px;"></div></div></div></pre><p><span> </span></p><blockquote><h2><a name="base标签" class="md-header-anchor"></a><span>base标签</span></h2></blockquote><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="" style="break-inside: unset;"><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 4px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><span><span>​</span>x</span></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">1.标签定义及使用说明</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;base&gt; 标签为页面上的所有的相对链接规定默认 URL 或默认目标。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">在一个文档中，最多能使用一个 &lt;base&gt; 元素。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;base&gt; 标签必须位于 &lt;head&gt; 元素内部。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">2.浏览器支持</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">所有主流浏览器都支持 &lt;base&gt; 标签。</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">3.实例</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;head&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;base href="/Volumes/dancework/html/images/"&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/head&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;body&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;!--/Volumes/dancework/html/images/cover.jpg--&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;img src="cover.jpg" /&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;/body&gt;</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 416px;"></div><div class="CodeMirror-gutters" style="display: none; height: 416px;"></div></div></div></pre></div>
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